import java.util.Scanner;

public class _4_25_homework {
    public static void main(String[] args) {
        Scanner scanner=new Scanner(System.in);
        int n=scanner.nextInt();
        int count=0;
        while (n!=0){
            n=n&(n-1);
            count++;
        }
        System.out.println(count);
    }
    public static void main02(String[] args) {
        Scanner scanner=new Scanner(System.in);
        int a=scanner.nextInt();
        int b=scanner.nextInt();
        int c=a%b;
        while (c!=0){
            a=b;
            b=c;
            c=a%b;
        }
        System.out.println(b);
    }
    public static void main01(String[] args) {
        //计算1/1-1/2+1/3-1/4+1/5 …… + 1/99 - 1/100 的值
        double sum=0;
        for (int i = 1; i <=100 ; i++) {
            if (i%2==0){
                sum=sum-1.0/i;
            }else{
                sum=sum+1.0/i;
            }
        }
        System.out.println(sum);
    }
}
